Process of making electric condensers.



PATENTED NOV. 27,}906.

H. P. GLAUSEN. PROCESS OF MAKING ELECTRIC GONDENSERS.

APPLICATION FILED FEB. 2, 1903.

' UNITED sTATEs- PATENT FEICE.

HENRY P. CLAUSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN ELECTRICTELEPHONE COMPANY, or CHICAGO, ILLINOIS, A COR- PORATION.

PROCESS OF MAKING ELECTF IIC CONDENSEFIS- No. ssasesl Specification ofLetters Patent.

' Patented Nov. 27, 1906.

Application filed February 2, 1908. Serial No- 141;460.

To all whom it may concern:

fication.

A common form of electric 'cohdenser consists of a flattened rollcomposed of a plurality of thin metal sheets or stri' s, with interposedstrips or sheets of die ectric. Ordinarily the metal strips which formor constitute the plates of the condenser are of metal foilsuch, forexample, as tin-foilwhile the interposed sheets of dlele'ctric mayconsist of parafined paper or other like non-Conducting material, and,as stated, the metal 7 and dielectric thus rolled together in alternatelayers ispreferably subjected to pressure after the roll has beenremoved from the apparatus, and this flattened mass of metal anddielectric after being subjected to any further desired treatment andafter being suitably incased or mounted then constitutes the completedarticle. Condensers of this character are employed in great numbers,particularly in telephone systems, and

it is consequently necessary, or at least deslrable, that the cost ofmanufacturing these condensers be reduced as much as possible, and whilea cheap article isdesirable it must also be of an efiiclent and reliablecharacter.

Generally stated, the object of my inven- 1m rovement tendmgto increasethe genera efiiciency of a process of. this particular character.

To the foregoing and other useful ends my inventionconsists in mattershereinafter set forth and claimed;

In the accompanying drawings, Figure 1 is .a diagram illustrating thefirst step in my improved process for making electric condensers. ig. 2is a diagram illustrating the second step of the said process. Fig. 3111118- tratesanother ste in said process. Fig. 4 1s a perspective 0 thecompleted condenser before it 1s incased or mounted.

As thus illustrated my improved process for making condensers is of acharacter which insures the production of a bi h-class article atacompa'ratively low cost 0 manufacture and which I find to be verysatisfactor and efficient in practice.

referably and preparatory to the first step a single sheet or stri ofthin metal 1 is supported in the form 0 the roll 2, while a couple ofstrips or sheets of paper 3 and 4 are mounted in the form of similarrolls, as-

shown at 5 and 6. With this arrangement the sheet of metal is betweentwo sheets of paper or dielectric, and the three end portions are thenbrought together and passed over the supporting-roll 7. After this thethree-ply or composite sheet of metal and dielectric is then broughtunder the roll 8 and thence upwardly over the other supporting-roll 9and is then led to the windin in roll 10. The roll 8 is, it will beobserve preferably supported in a receptacle 11, which may containboiling araffin or other like substance. ThuswhenterolllOiso erated andthe paper and metal cause to travel in the direction indicated by thearrow, the three-ply or composite sheet is compelled to pass around theroll 8 and through the hot paraffin and thence upwardly over the roll 9.Upon passin over the roll 7 the sheets of paper or,metal o,-not ofcourse, adhere to eac other; but upon emergin from the paraffinthe-three sheets are founc? to be adhering tightlyto each'other, andthis adhesive action is increased by causing the paper and metal to thenpass over the roll 9, and, furthermore, this roll 9 serves to veryefiectually'expel the air from any air-bubbles that may at such timeexist between the metal and paper. Consequently when the paper and metalreaches the roll 10 it is then in the form of a single three-ply orcomposite sheet composed of two sheets of paraffined paper with aninterposed sheet or stri of Inetalsuch, for example, as tinfoil. Tworolls of these three-ply or composite strips are then arranged together,substantially as shown in Fig. 2, and the three-ply or composite stripsfrom each roll are then brought together and led over the winding-inroll 12. Upon this latter roll the two composite strips are woundtightly together in the form of a cylindric bundle or roll. When thisbundle or roll is of the proper size or of the proper number of turns,it is then removed and subjected to pressure, so as to flatten it intothe form shown in Fig. 4. These flattened condenser-rolls can then besubjectedjo a further waterproofing action, so as to make themabsolutely air-tight and damp-proofas, for example, by placing them in areceptacle 13 containing heated or boiling paraffin. After this theflattened condenser-rolls are then ready for any further desired ornecessary treatment preparatory to mountin or incasing them, as will bereadily understood without further description or explanation.

What I claim as my invention is- 1'. The process of making electriccondensers, which involves as steps, the drawing of two strips of aperand an interposed strip of metal throug a liquid consistin of heatedparaffin, so as to reduce the said s ieet material to a three-ply orcomposite strip, and

then rolling together two of said three-ply or composite strips, thesaid sheets or strips of material being held apart at a point or pointsin their path of travel before enteringlthe liquid, but held flatwiseagainst each other just before and at all times subsequent to'enteringthe li uid, whereby the non-adhering surfaces of t 1e sheets or stripsat a point or points intheir path of travel before they enter the liquidare caused to adhere to each other u on and after passing therethrough.

2. T e process 0 making. electric condensers, which consists in causingtwo sheets of dielectric and an interposed sheet of metal to passthrough a li uid consistin of heated paraflin, so as to re uce the saids eet material to a three-ply or composite strip, rolling together twoof said composite strips, flattening the roll thus formed, and thenimmersing the flattened roll in heated paraffin, the said sheets orstrips of material being held apart at a point or points in their ath oftravel before entering the liquid, but eld flatwise against each otherjust before and-at all times subsequent to enterin the liquid, wherebythe non-adhering su aces of the sheets or strips at a point or points intheir path of travel before they enter the liquid are caused to adhereto each other upon and assing therethrough.

.he process of making condensers, which consists in bringing togethertwo strips of dielectric having a metal strip therebe tween, the passingof said three-ply strip after 'over a roll whereby said plies are heldsecurely together, the passing of said strips through a bath of heatedinsulating material, the rollin of two of said three-ply strips into acomposite roll, the flattening of said roll, and the subjecting of saidroll to an immersion in a bath of insulating material.

4. The rocess of making condensers, which consists in bringing togethertwo strips of dielectric having a metal strip therebetween, the passingof said three-ply strip over a roll whereby said plies are held securelytogether, the passing'of said strips through a bath of heated paraffin,the rolling of two of said three-ply strips into a composite roll, theflattening of said roll, and the subjecting of said roll to an immersionin a paraffin-bath.

Signed by me at Chicago, Cook county, Illinois, this 23d day of January,1903.

HENRY P. CLAUSEN. Witnesses:

WM. A. HARDERS,

I'IARRY P. BAUMGARTNER.

